SOLUTION: one grocery clerk can stock a shelf in 20min whereas a second clerk reguires 30min to stock the same shelf. how long would it take to stock the shelf if two clerks worked together?

Question 82982This question is from textbook introductory algebra
: one grocery clerk can stock a shelf in 20min whereas a second clerk reguires 30min to stock the same shelf. how long would it take to stock the shelf if two clerks worked together? This question is from textbook introductory algebra

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
one grocery clerk can stock a shelf in 20min whereas a second clerk requires 30min to stock the same shelf. how long would it take to stock the shelf if two clerks worked together?
:
Let x = time required if both worked together:
Let the completed job = 1
:
+ = 1
:
Multiply equation by 60 and you have:
3x + 2x = 60
5x = 60
x = 60/5
x = 12 minutes, work together
:
:
Check solution
12/20 + 12/30 =
6/10 + 4/10 = 1

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